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Discuss in DETAIL the development of the ductus venosus. Be complete and specific.

The liver grows laterally to the umbilical vv and allows for a more direct route to the heart through hepatic sinusoids. The diagonal blood flow between left & right vitelline veins eventually form the ductus venosus.

Discuss the development of the inferior vena cava. Include segments and embryonic vessels responsible. Use right or left if necessary. Both segment and embryonic vessels must be correct to receive ANY credit.

What specific embryonic vessels (give right or left if necessary) give rise to: a) right renal vein b) proximal left renal vein

a) intersubcardinal anastamosis b) intersubcardinal anasatmosis

Which ONE of the following statements is FALSE? a. only about 1/6 of the adult alveoli are present at birth

TRUE

Which ONE of the following statements is FALSE? c. surfactant is produced at 7 months of fetal development

TRUE

Which ONE of the following statements is FALSE? a. the PRIMITIVE choanae are located behind the primary palate b. paranasal sinuses are formed when bones are excavated c. surfactant is produced at 7 months of fetal development

a. the PRIMITIVE choanae are located behind the primary palate - T b. paranasal sinuses are formed when bones are excavated - T c. surfactant is produced at 7 months of fetal development - T

Which ONE of the following statements is FALSE? b. the laryngotracheal groove develops from the pharynx during the 4th week of development

TRUE

Which is FALSE? d. in tracheoesophageal fistula, rarely do both the proximal and distal parts of the esophagus open into the trachea e. by the time the lung reaches adult maturity, a total of 17 generations of subdivisions form the bronchial tree

d. T e.
F - (should be 23)

Which ONE of the following statements is FALSE? d. endoderm gives rise to the epithelium, but not connective tissue of the larynx, bronchi, and lungs

TRUE

Which ONE of the following statements is FALSE? e. in tracheoesophageal fistula, there is usually an additional fibrous cord attached to the larynx